how can i make one object copy form of another object?
I think the ShrinkWrap modifier could the job you are looking for.
It allows you to shrink vertices of one object to the closest vertices of the other one.





Steps:


Place the objects to the same position
Select the low-detail one
Go to modifiers tab and select ShrinkWrap

Pick the high-detailed object as a Target


There are some useful options available in the modifier so you can look at the ShrinkWrap Modifier overview in the Blender Manual.